Method of processing oils



Patented June 4, 1929.

uNir nSTA ES ATENT?-QFFWE 'LOUIS J. REIZENSTEIN,-OF PITTSBURGH, PENNSYLVANIA. I]

; MET-HOD. or PneeEssrIiG Iil'o Drawing.

der high heats and loads) that is miscible; at normal temperatures in ,u'nneral oils are many and obvious, and one object of this invention is the provision of a method of processing cast-or oil whereby it is rendered miscible in mineral oils at normal or ordinary temperatures.

The value of a stable mixture of caster oil and a mineral oil in proper proportions to provide a relatively cheap lubricant of high lubricating value is now recognized, especially by aeroplane and automotive engineers and operators as a lubricant for internal combustion engines.

Another object of this invent-ion is to produce a. mixture of mineral oil and a miscible caster oil. The percentage of caster oil in the mixture will depend upon the duty to which the mixture is to be put and the price at which it is to be sold.

I have found that a mixture of mineral oil with a percentage, say from 5% to 40% of castor oil processed in accordance with my invention has remarkable lubricating qualities under high heat and is particularly applicable for use in internal combustion engines.

ixtures of mineral oil of the non-viscous type such as certain of the Russian oils having an extremely low cold test, and castor oil processed in accordance with my invention are valuable as lubricants for use in places where fluidity is required at low temperatures.

In processing castor oil, in accordance with my invention, the oil to which a small percentage of inorganic salt has been added is placed in a tank or other suitable open vessel and heated.

I have found that a number of inorganic salts may he used, for example, aluminum sulphate, aluminum chloride, aluminum oxide, stanuous sulphate, thorium oxide and thorium chloride. Any one of these salts when added in suitable quantity to castor oil ill, when the oil is raised to the proper tem perature and maintained at such temperature for the required length of time, render the oil miscible in mineral oil. I prefer however, to use aluminum sulphate, since others.

'about 5 per cejii tidf the alt I, t-lie same to a'teii perature etweeii 150 (3.,

Application fil ed December 27.1924. seminar-58 344.,

the processing maybe carried o lit wifh lower temperatures} with 'All'jtliat' o' de iis to" add re oil ind heat and the decoin'posit ion,pbiii of' tli'ei I pro for to'jh'ea'tto abo 11ft"l,( $0" C. ,1 Some caster oils require "longer heating" tha'ri others -md therefore, it will be advisable to test the oil from time to time in order to find out when it reaches the condition in which it is miscible with mineral oil at normal temperature. When this condition is reached the oil willbe poured from the tank or vessel in which it is heated and separated from the salt.

By way of example, place 1000 pounds of castor bean oil and 60 pounds of aluminum sulphate in a suitable kettle and raise to a temperature of about 200 C. Held at this temperature for approximately six to seven hours. Take a small sample of the oil after six or seven hours, allow the same to cool and test for its solubility in cold mineral oil. If it is soluble in cold mineral oil, the reaction is complete. If it is not, it will be necessary to heat for a longer period or until the tests show that it is soluble in cold mineral oil. \Vhen the castor bean oil is soluble in mineral oil, the reaction is complete and the mineral salt may be then strained out of the castor oil and the castor oil is then ready for mixing with mineral oil.

Under the action of the heat and the inorganic salt the oil gradually takes on its new characteristics. The duration of time of heating, of course, depends upon the te1nperature to which the oil is raised and the amount of salt used. The higher the temperature the shorter the time of heating and the lower the temperaturethe longer the time of heating the amount of salt used being the SillllC.

Having thus described my invention, what I claim is 1. The method of treating castor oil to render it miscible with mineral oil, which consists in heating at atmospheric pressure castor oil in contact with a metallic salt or compound until said oil is miscible with mineral oil at normal temperature then in separating; the oil and salt.

2. The method of treating castor oil to render it miscible with mineral. oil, which consists in heating castor oil in eoititaet with u "5' salt than with the" aluminum su'lphate imti l fsaid 9&1 is miscible with mineral oil at normal temperature and then in separating the oil and aluminum" A fifiThe methodi of treating castor oil to render it miscible with mineral oil, which sulphate.

5 3. The method of treating castor oil render it miscible with mineral 'oilj-w'hich consists in heating at atmospheric pressure castor oil in contact with aluminum sulphate until said oil ismisciblewith mineral oil at normal temperature; aiid then in separating the oil and the aluminum sulphate.

- ,4r. 'l he method oi treating castor oil to irender it miscible Withmine'ral oil, which con's i'stsi in heating at; atmospheric pressure 1 raw; "cases; oil to a temperature between lso lei nd' the "decomposition point of said tt 'ilini e fie lt ith; @Qdalfi ee 9 9 ber, 1924.

ipouiid' until saidoil fs-miscible with mineral oil at normal temperature and theri'in separating the oil and said salt.

consists ixiheating at atmospheric pressure raw castoixoll to a temperature between 150 C. and tlie deco mp os'ition point of sa'id oil in contact with aluminum sulphate until said oil is miscible with mineraloil at normal temperature and then in' separating the alumin' 'imj 'sulphateIandtheoilg. i f v In testimony 'wlier'e'oL P'have hereunto Subscribed m$ i1 .i -mEI'z sTEI 

